AConnet 1-1/2 Inch Ceiling Mount Single Pulleys Designed for Use with Rope or Cord in Indoor and Outdoor Applications. Fit for for 3mm-10mm wire rope, climbing rope or twine. No noise, smooth save effort. Zinc plated finish provides corrosion resistance. USED FOR: Home fitness, outdoor work and pulley lift system for kayak storage. DO NOT USE FOR OVERHEAD LIFTING. Specifications: Material: Iron Safe Working Load: 420 lbs Size: please refer to the picture Surface: Zinc-Plated Mounting Screws: M5 Quantity: 6 Piece Pulley Wall Mount Note: Please allow 1-3mm error due to manual measurement.